Yesterday and last night I felt my uterus tighten and it got really hard. Lasted about 10 seconds and only happened a couple of times but freaked me out. From research looks like it could be BH contractions, I'm going to stay super hydrated from now on (I've been bad at that) but should I see my doctor or when should I call? I see her Dec 7th. I'll be 16 weeks on Sunday.